期刊
PETROLEUM CHEMISTRY
卷 61, 期 2, 页码 115-122出版社
MAIK NAUKA/INTERPERIODICA/SPRINGER
DOI: 10.1134/S0965544121020109
关键词
dimethyl ether; one-step DME synthesis; two-step DME synthesis; energy assessment
Several process solutions for one-step synthesis of dimethyl ether (DME), including recovery from gaseous and liquid phases, were reviewed. It was found that energy-intensive absorption is the most common method for DME recovery from a gaseous stream. World licensors of one-step DME synthesis provide an additional dehydration reactor to utilize methanol co-product. Energy and capital intensity were estimated for two DME production options, with the one-step option being inferior to the two-step design in terms of key cost factors.
A number of process solutions for one-step synthesis of dimethyl ether (DME), including a step of its recovery from the gaseous and liquid phases, were reviewed. It was demonstrated that energy-intensive absorption is the most common method for DME recovery from a gaseous stream containing syngas components. It was also shown that the world licensors of one-step DME synthesis provide for an additional dehydration reactor to utilize the methanol co-product. Energy and capital intensity was estimated for two DME production options, specifically the methanol dehydration route and the one-step DME synthesis over a bifunctional catalyst. Finally, it was demonstrated that the one-step option is inferior to the two-step design in terms of both criteria, and that the key cost factor is associated with DME recovery from the gaseous phase.
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